Service manual

3. Electrical Parts
3-35
SDG65S/100S-6A6
SG06025E
The R in the parenthesis shows connection point of SDG100S.
Function
1) Starting operation while stopping
• When voltage is applied to S terminal from starter switch or auto start unit No.8 terminal, the
input from B terminal will be outputted from C terminal , and starter begins to rotate and
then engine starts.
• When the output voltage DC21.5V of alternator is applied to R terminal after engine starts,
the input from B terminal will not be outputted from C terminal so that the starter stopper
rotation.
2) Starting operation during operation
• While engine is running, the output voltage (more than DC22.5V) is applied to R terminal. So
even after voltage is applied to S terminal from starter switch the starter will not rotate
because the input from B terminal is not outputted from C terminal.